diff --git a/src/cell.cpp b/src/cell.cpp
index cdbb446172..8cdc7b6f64 100644
--- a/src/cell.cpp
+++ b/src/cell.cpp
@@ -520,12 +520,5 @@ extern "C" {
   }
 }
 
-//extern "C" void free_memory_cells_c()
-//{
-//  delete cells_c;
-//  cells_c = nullptr;
-//  n_cells = 0;
-//  cell_dict.clear();
-//}
 
 } // namespace openmc
diff --git a/src/geometry_aux.cpp b/src/geometry_aux.cpp
index e79a00264b..dc31edf7e4 100644
--- a/src/geometry_aux.cpp
+++ b/src/geometry_aux.cpp
@@ -321,4 +321,23 @@ maximum_levels(int32_t univ)
   return levels_below;
 }
 
+//==============================================================================
+
+void
+free_memory_geometry_c()
+{
+  for (Cell *c : cells_c) {delete c;}
+  cells_c.clear();
+  cell_dict.clear();
+  n_cells = 0;
+
+  for (Universe *u : universes_c) {delete u;}
+  universes_c.clear();
+  universe_dict.clear();
+
+  for (Lattice *lat : lattices_c) {delete lat;}
+  lattices_c.clear();
+  lattice_dict.clear();
+}
+
 } // namespace openmc
diff --git a/src/geometry_aux.h b/src/geometry_aux.h
index 7d2c3cd9af..b998ad32c9 100644
--- a/src/geometry_aux.h
+++ b/src/geometry_aux.h
@@ -102,5 +102,11 @@ distribcell_path(int32_t target_cell, int32_t map, int32_t target_offset,
 
 extern "C" int maximum_levels(int32_t univ);
 
+//==============================================================================
+//! Deallocates global vectors and maps for cells, universes, and lattices.
+//==============================================================================
+
+extern "C" void free_memory_geometry_c();
+
 } // namespace openmc
 #endif // GEOMETRY_AUX_H
diff --git a/src/geometry_header.F90 b/src/geometry_header.F90
index d633b67005..758fc54da7 100644
--- a/src/geometry_header.F90
+++ b/src/geometry_header.F90
@@ -516,6 +516,12 @@ contains
 !===============================================================================
 
   subroutine free_memory_geometry()
+    interface
+      subroutine free_memory_geometry_c() bind(C)
+      end subroutine free_memory_geometry_c
+    end interface
+
+    call free_memory_geometry_c()
 
     n_cells = 0
     n_universes = 0
diff --git a/tools/ci/travis-script.sh b/tools/ci/travis-script.sh
index 6dfbc95106..ee445b517f 100755
--- a/tools/ci/travis-script.sh
+++ b/tools/ci/travis-script.sh
@@ -8,9 +8,7 @@ fi
 
 # Run regression and unit tests
 if [[ $MPI == 'y' ]]; then
-    pytest --cov=openmc -v --mpi tests/regression_tests
-    pytest --cov=openmc -v --mpi tests/unit_tests
+    pytest --cov=openmc -v --mpi tests
 else
-    pytest --cov=openmc -v tests/regression_tests
-    pytest --cov=openmc -v tests/unit_tests
+    pytest --cov=openmc -v tests
 fi